Carbureter.



im, TED STATES PATENT oEEroE.

WILLIAM H. C. HIGGINS, JR., OF ORANGE, NEW JERSEY..

CARBU Nofssaeea To all. whom it may concern:

Be it known that I, WILLIAM H. C. HIG- qins, Jr., a citizen of the United States, residing at Orange, in the State of New Jersey, have lnvented'certain new and useful Improvements in Carbureters, of which the folowing 1s a specification, reference being had to the accompanying drawings, forming a part thereof. io This-invention relates particularlysto the devices in which the gaseous mixture of hydroca'r n vapor and air for internal combustion' engines is formed and bywhich the volume and the quality of the mixture supplied I 5 are re ated. Devices of this character frequent y fail to secure satisfactory mixtures! -un'der all conditions. Moreover th valves in such devices are sometimes actuated by suction'and are controlled more or less by spring ion. f .A fj t is the object of this invention to enable a' under `all v arving conditions of engine -lqadand s ed, to' e 'Inmate the uncertainty z5 in action o suction actuated'and spring controlled valves by actuating the valves directly by mechanical means, and generally to improve the construction and operation of' devices of the character referred to/ Theinvention will be more fully described hereinafter with reference to the accompanydrawin .in which, for purposesof' illustration explanation of the nature of the invention, it is shown as embodied in a cpnvenient and practical structure.

In said drawin s Figure 1 is a top view of 4'the 'improved ear ureter, the fuel nozzle bei om1tted. F' 2 is a section on the lane in icated by the ine 2-2 of Fig. 1. i 3 is a section on the plane'indicated by the ine 3--3 of Fig. 2. Y

Inthe embodiment of the invention illustratcdl in the drawings the carbureting cham ber a is formed by a cap or cover b suitably `4.5 Secured to` the fiat Wall vc of a suitable casting d. In the wall care formed three ports, one

port e being' provided for the discharge of the combusti le mixture to the engine, and

- two ports f and g being provided for the gofadmission of air tothe chamber a to form the' combustible mixture -with the hydrocarbon which is admittedthrougl a needle valve h -of ordinary construction, from a constant- Bpecicaton of Letters Patent.

Application and July 1.a, 19de. semi No. 326,021.

tory explosive mixture to bepro- BETER.

Patented .nuls 11,1907.

y ports e, f and g are controlled by valves 1 which move simultaneously, referably b a I plate slide valve 'i which may e actuated y a lever lr, or other suitable means, 'from an l suitable source of motion, such as-the hand of the operator or an engine governor, if one be employed. Thev or is arranged to open the two ports ev and f in like measure or to close themin like measure, butto close the port g as the ports e and f are opened and viceversa.l Independent means are provided for regulating the ar of the port g, said means 'consist' struction shown, of a shutter. arr ed te slide longitudin y over the rt g an te be secured 1n 'adjusted position y a thumb nut and bolt m izo-operating with an ear "ofthe derivedriinthe ply nozzlefindithe uantityfffuel'fvvapoi needi valve oil: other -fuel j cated generallyat h isde quantity of hydrocarbon suppledisdetermined ,1n the usualv and ,well known manner byregulatiox of the valve h.' The de ee of vacuum in'the c mber a, suction of' the .engine isvonstant, depends and the air inlet port'sf and g.

If the' ort is .entirely closed by the shutter I, so' at movement of the slide valve @"lafs no 'e'ect on said port, it is obvious that the area ofthe port f for the admission of air will always be proportionate. to the area of [port f being wide open when lthe-port e is wide o n and being closedby the movement o the slide valve 'i in the same proportion as the port e is closed. W hen both rts lare wide o n the engine receives a full c a1'- of. air ari the valve h is'then ad 'usted y hand toadmit auch a quantity of ydrocarbon as will produce a 'satisfactory explosive mixture under auchl conditional the en 'ne then generating its full power. It wi l be seen, however, that if through the operation the load is thrown off the engine-, the slide valve 'i is shifted .to reduce the efectwe area of the ports e and f to the same extent, the

' level'hydrocarbon reservoir, not shown. Thel vacuum in the chamber a will remain about REISSUED y v ndent upon the' 'uantity of 4hydrocarbon suplpli'e'dandu onf the de of vacuum in theo amber q.. .he 8- upon the relative area of the discharge port eV of the llever k,'by hand or otherwise, when alves or valve plate are in tho conatthe' y the port e for the delivery of the mixture,

:zi l. p 850,688

the 'sanie as at fulll load, whereby, .since the supply-of hydrocarbon lremains constant under these conditions while the volume of air is decreased, the mixture` would be too rich.-

I 5 On the other hand, itthe shutter Z is with- 'lrawn so as to leave the port g wide o en, so

` that itis then opened by the slide va ve i in proportion tothe cl'osing of the ports e and f y-the same movement, the amount oi' air xo admitted to the chamber a. will de end upon thecombined effective areas of tiet'ports f and g. As indicated in Fig. 3 of the drawims, the port g is preferably somewhat longer than lports e and f, /although its width is x 5 about the same asthat of eachof the ports e and f. Furthermore, the shutter l is prefer ably of such length and so ad'usted that the port' g is never closed comp etely. It will now be understood that when the slide valve zo 'i is dropped'so as to open theports e and f wide, it will at the same time close the port g complete-lv, establishin the same condition as above. described, wit. 1 thehydrocarbon inlet valve h adjusted properly ,foropcrating -z`5 under full load. "elf," hmvever, the load be -thrown oil com letely the movement of the slide valve-'i wilitend to close the ports e and fand will open the port g. When the port e isalmost closed, allowing very littl(` mixture `3o vto'pass to the engine, and port f is closed to v the same degree while port g is nearly wide open, the'admissionof air to the chamber a ywill be. much in excess of the withdrawal and 4the vacuum in the chamber will therefore be 35 much reduced.y If the fuel inlet valve la is set as for operation -underfull load, 'as above Iescribed, the en ine, under these conditions, will get too litt e. fuel because of thelo'w degreeof vacuum. The shutter-l inust,t-here 4o fore,' e adjusted between the two extreme point for ordinary running conditions, so as to 'reduci` to. the. necessary extent the effective area of the 1port g and thus maintain a i roper degree o vacuum in the chamber a.

45 xfha ladjustment of the shutter I may be degermined by trial under varying conditions VItwill be understood that the details of construction and arrangement may be varied 5o to suit different ccnditions of`use and that the invention is not restricted to the precise construction or arrangement shown.

I claim as my inventionl. A carbureter comprising a mixing chamber provided vwith a fuel inlet, two air 5 5 admission ports, and a delivery port, means y actuated externally' of the carbureter for varyingsimultaneously the effet-tive area of all of' said ports, and independent means also actuated externally of the carbureter for 6o varying the effective area of one of the air admission ports.

2. A carburetor comprising a mixing chamber rovided with a fuel inlet, a port for the de ive-ry ofthe vmixture'and a plural- 65 ity of ports for the admission of air, posi` tively actuated means to open and close the delivery port and one of said air ports and positively actuated means to close and open co-ordinately another of said air ports in op- 7o position.

.3. A* carbureter comprising a mixing chamber provided with a fuel inlet, a delivery port or themixture, and a plurality of. air inlet ports, means to o en and close the 75 delivery port and" one o the inlet ports, means actuating"simultaneously therewith, to close and open another of the inlet ports, and means to adjust the effective area ofthe last named inlet port. 8o

`4. A 'carbureter comprising a.' mixing chamber provided with a `,fuel inlet, a port-, for the delive of lthe, inixturev=-and` two ports for the'in et of air,and a valve c o-operating with saidportsto open the delivery 8 1,l

port andv one ofthe air orts and simultane ous'ly close the other o the .air inlet porte,

and vice versa. -v .y

v5. VA carbureter comprising a mixingfl.

chamber rovidedy with a fuel inlet, a portfgoy for the de iverv of the mixture and two ports for the inlet of air, a valve (io-operating with said ports to open the delivery port and one of the `air ports and simultaneously close the other of t le air inlet ports and vice versa, 95*l and means to adjust the effective area-of the' f last named inlet port.

This speciiication signed and witnessed Y Athis'7th day of July A. D., 1906. 1v

WILLIAM H. C. HIGGINS, JR.

Sl'gncdin the pres-ence of-i- Jonav A. Sacca, EDWARD BULL.' 

